util

func MarshalWithExtensions ¶

func MarshalWithExtensions(v any, extensions map[string]any) ([]byte, error)

marshalWithExtensions marshals a struct with extensions inlined. This is a helper for custom MarshalJSON implementations.

IMPORTANT: When calling this function, the caller MUST use a type alias to avoid infinite recursion. For example,

func (s *MyStruct) MarshalJSON() ([]byte, error) {
    type myStruct MyStruct  // Type alias prevents recursion
    return marshalWithExtensions(myStruct(*s), s.Extensions)
}

Without the type alias, json.Marshal would recursively call MarshalJSON on the same type, causing infinite recursion. The type alias creates a new type that doesn't have the MarshalJSON method, allowing standard JSON marshaling to proceed.